CREDNER, Hermann (1841—). A German geologist, son of the preceding, born at Gotha, and educated at Clausthal, Breslau, and Göttingen. He has made extensive geological investigations in North and Central America (1864-68), the results of which were published in the Zeitschrift der Deutschen Geologischen Gesellschaft, and the Neues Jahrhuch für Mineralogie. In 1870 he became professor of geology at the University of Leipzig, and director of the Geological Commission for the Kingdom of Saxony. In addition to a geological chart of the Kingdom of Saxony (1877 et seq.), and numerous works on the geological formations of that country, his works include Elemente der Geologie (8th ed., 1897).